onvav
Newbie level 1
Hello,
I'm working on a project with SIM900B modem (firmware 1137B06SIM900B32_ST) and I observe strange behavior of the modem or GPRS network.
Sometime, when the modem establish GPRS connection and sends packets through GPRS network to our server, this packets arrives twice, every pcket is duplicated. Somewhere on the way SIM900B->SERVER pakets are duplicated (UDP protocol). If connection is shuted down and established again, then works fine. Do you have any experiences with it? It is modem, network or provider issues? It is UDP protocol feature? I apologize for my bad English. Many thanks in advance.
I'm working on a project with SIM900B modem (firmware 1137B06SIM900B32_ST) and I observe strange behavior of the modem or GPRS network.
Sometime, when the modem establish GPRS connection and sends packets through GPRS network to our server, this packets arrives twice, every pcket is duplicated. Somewhere on the way SIM900B->SERVER pakets are duplicated (UDP protocol). If connection is shuted down and established again, then works fine. Do you have any experiences with it? It is modem, network or provider issues? It is UDP protocol feature? I apologize for my bad English. Many thanks in advance.